Discrete Geometry for Computer Imagery 8th International Conference, DGCI'99, Marne-la-Vallee, France, March 17-19, 1999 Proceedings - Bertrand, Gilles; Bertrand, Gilles; Couprie, Michel; Couprie, Michel; Perroton, Laurent; Perroton, Laurent (Springer Berlin Heidelberg : Imprint: Springer, 1999)